// the END_TRY marker should go after that. Otherwise, the whole try-catch
// is contained within this loop, so the END_TRY should go before that.
if (MI.getOpcode() == WebAssembly::END_LOOP) {
- if (EndToBegin[&MI]->getParent()->getNumber() >= Header->getNumber())
+ // For a LOOP to be after TRY, LOOP's BB should be after TRY's BB; if they
+ // are in the same BB, LOOP is always before TRY.
+ if (EndToBegin[&MI]->getParent()->getNumber() > Header->getNumber())
BeforeSet.insert(&MI);
#ifndef NDEBUG
else
ret void
}
+; Tests if try/end_try markers are placed correctly wrt loop/end_loop markers,
+; when try and loop markers are in the same BB and end_try and end_loop are in
+; another BB.
+; CHECK: loop
+; CHECK: try
+; CHECK: call foo
+; CHECK: catch
+; CHECK: end_try
+; CHECK: end_loop
+define void @test4(i32* %p) personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) {
+entry:
+ store volatile i32 0, i32* %p
+ br label %loop
+
+loop: ; preds = %try.cont, %entry
+ store volatile i32 1, i32* %p
+ invoke void @foo()
+ to label %try.cont unwind label %catch.dispatch
+
+catch.dispatch: ; preds = %loop
+ %0 = catchswitch within none [label %catch.start] unwind to caller
+
+catch.start: ; preds = %catch.dispatch
+ %1 = catchpad within %0 [i8* null]
+ %2 = call i8* @llvm.wasm.get.exception(token %1)
+ %3 = call i32 @llvm.wasm.get.ehselector(token %1)
+ catchret from %1 to label %try.cont
+
+try.cont: ; preds = %catch.start, %loop
+ br label %loop
+}
+
declare void @foo()
declare void @bar()
declare i32 @__gxx_wasm_personality_v0(...)